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6.0L Power Stroke Engine and Drivetrain Discussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.0L Power Stroke engine.

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Old 05-01-2007, 11:47 PM   #1 (permalink)
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transmission flush mileage

I was told by service manager that even though owners manual says flush transmission fluid and change filter at 30,000 Ford has now recommended that it not be done until 100,000. He is willing to give me something in writing since I insisted. Anyone else heard anything like this?
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Old 05-02-2007, 05:52 AM   #2 (permalink)
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Re: transmission flush mileage

The tech that works on my truck said to change the external filter every 30,000 miles and you dont have to flush the trans for 100,000 miles. Id like to know too. Of course I was told that after I paid them to flush it. [img]/ubbthreads/images/graemlins/shrug.gif[/img]
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Old 05-02-2007, 06:32 AM   #3 (permalink)
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Re: transmission flush mileage

I was going to have mine done next week.

Doc... What say you?
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Old 05-02-2007, 07:49 AM   #4 (permalink)
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Re: transmission flush mileage

yes i have 61k and was taking mine in for a flush next week also , i would love to know [img]/ubbthreads/images/graemlins/shrug.gif[/img] doc ? grampy jim?
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Old 05-02-2007, 09:03 AM   #5 (permalink)
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Re: transmission flush mileage

Dropped the 8 qts. or so in mine and changed the external (toilet paper roll) filter around the 30,000 mark. Considering dropping it agin at 45,000 at changing both filters since you don't get all of the fluid out by just drining the pan. I am leary of the flush and local personell whom are doing the flushing where I am.
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Old 05-04-2007, 05:03 PM   #6 (permalink)
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Re: transmission flush mileage

1 drain the pan every 10k and add 8 qts. then by 30k it's a complete flush almost.
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Old 05-04-2007, 07:19 PM   #7 (permalink)
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Re: transmission flush mileage

[ QUOTE ]
1 drain the pan every 10k and add 8 qts. then by 30k it's a complete flush almost.

[/ QUOTE ]

That's what I do also. I brought mine in for the flush at 30,000 the transmission guy told me to not to flush it, just drain the pan every 10k-15k and change the external filter with it.
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Old 05-05-2007, 08:55 AM   #8 (permalink)
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Re: transmission flush mileage

have any of you had a hard time unscrewing the external filter housing? that son of a bicch is on tight...
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Old 05-05-2007, 10:06 AM   #9 (permalink)
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Re: transmission flush mileage

[ QUOTE ]
have any of you had a hard time unscrewing the external filter housing? that son of a bicch is on tight...

[/ QUOTE ]

The flimsy mounting bracket is the major problem with loosening the housing.
I put anti-seize on the threads the last time a couple years ago and recently it was still too tight to remove comfortably with a socket and ratchet handle.

I got an electric impact wrench and will use that from now on.
The Impact doesn't stress the mount and just a couple blips breaks it free.
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Old 05-14-2007, 08:26 PM   #10 (permalink)
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Re: transmission flush mileage

No where in my 04 manual does it say to flush. The dealers like to use their flush machines.
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Old 05-15-2007, 09:16 AM   #11 (permalink)
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Re: transmission flush mileage

Here's the trick to solved the weak brackett problem. Place a wood block between the brackett and frame to take up the space. You can now crank away to loosen the filter housing without the brackett bending.
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Old 05-15-2007, 01:02 PM   #12 (permalink)
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Re: transmission flush mileage

45k on my tranny fluid and it's pretty and pink. No burned smell either. I think I'll just change the external filter for now.
Is there a TSB or something for that 100k mileage recommendation from Ford?
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Old 05-15-2007, 01:09 PM   #13 (permalink)
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Re: transmission flush mileage

maint schedule in diesel suppliment on the 03 says every 30000 miles
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Old 05-15-2007, 02:42 PM   #14 (permalink)
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Re: transmission flush mileage

Hummmm

Let's see $150 for a complete flush and an new external filter verses what a new or rebuilt trans would cost? [img]/ubbthreads/images/graemlins/confused.gif[/img]

I think I'll pay for the trans flush and filter every 30K. Seems like cheap insurance to me.

Oh ya what does a tow cost when your hauling a trailer or big inbed camper? [img]/ubbthreads/images/graemlins/eek.gif[/img]
My guess is several trans flushes and filters. Add to that the upset family members and the lost or <font color="red">ruined vacation</font> and it seems like a no brainer to me.

Oh well, to each his own, I guess. [img]/ubbthreads/images/graemlins/shrug.gif[/img]
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Old 05-15-2007, 03:14 PM   #15 (permalink)
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Re: transmission flush mileage

AllenF -- Easy there on your criticism. There is no definitive requirment that the TS transmission be flushed every 30K miles. The maintenance schedule just states to change the fluid. If all the fluid that comes out is still in very good shape, then the flushing may only achieve a marginal benefit that is never realized. Most of the posters on this site do not tow 24/7 as hot shotters or equipment haulers, such that most transmissions are not operated under severe duty conditions. There is not even consensus among the techs that post here whether or not flushing is required.
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